Information processing apparatus

ABSTRACT

The invention presents an information processing apparatus of simple structure capable of distinguishing the state of use, automatically changing over the display direction of the display screen, and excellent in shock durability, protection from water drop and dust, and power saving property. The information processing apparatus comprises a main body having a first contact-free sensor means, a display unit having a display panel and a second contact-free sensor means, a hinge having axes of rotation for coupling the main body and the display unit, and a display processor for rotating the display of the display panel. At least either the first contact-free sensor means or the second contact-free sensor means sends a first signal to the display processor when the first contact-free sensor means and the second contact-free sensor means are placed face to face, and the display processor rotates the display of the display panel according to the first signal.

FIELD OF THE INVENTION

[0001] The present invention relates to an information processing apparatus, and more particularly to an information processing apparatus having a foldable display unit, with the display panel serving also as an input tablet.

BACKGROUND OF THE INVENTION

[0002] Among personal computers as information processing apparatus, recently, so-called notebook-sized personal computers are widely used. Notebook-sized personal computers are small and portable, and occupy a small space on desk, and various professional types are manufactured.

[0003]FIG. 5 is a perspective view of a conventional notebook-sized personal computer having a display panel serving also as input tablet, and allowing both keyboard input and tablet input. FIG. 6A and FIG. 6B are side views showing two closed states of display unit in the conventional notebook-sized personal computer. FIG. 7 is a perspective view explaining a method of use of tablet of the conventional notebook-sized personal computer.

[0004] In FIG. 5, this notebook-sized personal computer comprises a main body 101 and a display unit 102, which are coupled through a hinge 105. The display unit 102 has a display panel 103 and a button 121, and the display panel 103 is protected by a back cover 104. The display panel 103 is also a tablet for pen input. The hinge 105 has axes of rotation in two mutually orthogonal directions. A first axis of rotation is an opening and closing axis of the main body 101 and display unit 102. This opening and closing direction is indicated by arrow 105 a. The display unit 102 is thus opened and closed, and has a free end 102 a and a fixed end 102 b. A second axis of rotation is a rotating axis of the display unit 102. This rotating direction is indicated by arrow 105 b.

[0005]FIG. 6A is a side view of a personal computer in a finished state after closing the display unit 102 from the state in FIG. 5. FIG. 6B is a side view of a personal computer in a closed state of the display unit 102 after rotating the display unit 102 in FIG. 5 by 180° in the direction of arrow 105 b. A carrying strap 108 is attached to the main body 101. In FIG. 6A and FIG. 6B, same reference numerals as in FIG. 5 are same parts as in FIG. 5, and their explanation is omitted.

[0006] When a personal computer is used in office, usually, the personal computer is put on desk, and the keyboard 106 is operated by both hands as shown in FIG. 5. After work, as shown in FIG. 6A, the display panel 103 is folded inside, and it is portable in this state.

[0007] When a personal computer is used outdoors, the display panel 103 is opened upward as shown in FIG. 6B and a pen input device 107 is manipulated. FIG. 7 is a perspective view showing a holding method of the personal computer in the case of pen input in outdoor use. The personal computer is held by one hand by passing fingertips through the strap 108, and the pen input device 107 detached from the main body 101 is held by the other hand, and pen input is made in a specified region of the display panel 103 functioning as tablet. In FIG. 7, same reference numerals as in FIG. 5 are same parts as in FIG. 5, and their explanation is omitted.

[0008] In the personal computer having such structure, in this state, the display shown in the display panel 103 is inverted upside down between the keyboard input as shown in FIG. 5 and the pen input as shown in FIG. 7. Accordingly, the display direction must be changed over. That is, in FIG. 5, the upper side of the screen must be located near the free end 102 a. And in FIG. 7, the lower side (front side) of the screen must be near the free end 102 a. The button 121 is provided for rotating the display panel by 180°, and by manipulating this button 121, the display direction of the display panel 103 can be changed over manually.

[0009] Although it is not of the pen input type, Japanese Laid-open Patent No. H8-179851 discloses an apparatus having an exposed protrusion and a switch for changing over the display direction of the screen automatically.

[0010] Common problems of the portable personal computers are portability and power saving. In addition, portable personal computers for professional use are demanded to have a higher toughness than the personal computers used indoors. The personal computer shown in FIG. 5 is also used for professional purposes. Therefore, during use as shown in FIG. 7, it is required to have shock durability of withstand dropping of the personal computer main body by mistake or hitting against any hard object, shake durability during carrying, and resistance to rain and water drops, dust and others during outdoor use.

[0011] Therefore, as in the prior art, if the button, protrusion or switch for changing over the display direction is provided on the outer side, the shock durability, or protection from water drops or dust cannot be satisfied.

SUMMARY OF THE INVENTION

[0012] The information processing apparatus of the invention comprises:

[0013] a main body having first contact-free sensor means;

[0014] a display unit having a display panel and second contact-free sensor means;

[0015] a hinge having axes of rotation in two directions for coupling the main body and the display unit; and

[0016] a display processor for rotating the display of the display panel,

[0017] wherein at least either the first contact-free sensor means or the second contact-free sensor means sends a first signal to the display processor when the first contact-free sensor means and the second contact-free sensor means are placed face to face; and

[0018] wherein the display processor rotates the display of the display panel according to the first signal.

BRIEF DESCRIPTION OF THE DRAWINGS

[0019]FIG. 1 is a perspective view of a notebook-sized personal computer in an exemplary embodiment of the invention.

[0020]FIG. 2A is a plan view of folded state of display unit of the notebook-sized personal computer in the exemplary embodiment of the invention.

[0021]FIG. 2B is a plan view of other folded state of display unit of the notebook-sized personal computer in the exemplary embodiment of the invention.

[0022]FIG. 3 is a perspective view of a notebook-sized personal computer in the exemplary embodiment of the invention.

[0023]FIG. 4A is a plan view of folded state of display unit of the notebook-sized personal computer in the exemplary embodiment of the invention.

[0024]FIG. 4B is a plan view of other folded state of display unit of the notebook-sized personal computer in the other exemplary embodiment of the invention.

[0025]FIG. 5 is a perspective view of a notebook-sized personal computer in a prior art.

[0026]FIG. 6A is a side view explaining a closed shape of display unit of the notebook-sized personal computer in the prior art.

[0027]FIG. 6B is a side view explaining other closed shape of display unit of the notebook-sized personal computer in the prior art.

[0028]FIG. 7 is a perspective view explaining a method of use of tablet of the notebook-sized personal computer in the prior art.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

[0029] It is hence an object of the invention to solve the problems of the prior art, and present a portable information terminal of a simple structure capable of distinguishing keyboard input operation and pen input operation, and changing over the display direction of display panel automatically. The invention also presents a portable information terminal excellent in shock durability, protection from water drops and dust, and saving of energy.

[0030] Exemplary embodiments of the invention are described below while referring to the accompanying drawings.

Exemplary Embodiment 1

[0031]FIG. 1 is a perspective view of a two-input type notebook-sized personal computer for keyboard input and tablet input in exemplary embodiment 1 of the invention. FIG. 2A and FIG. 2B are plan views of folded state of display unit of the notebook-sized personal computer in exemplary embodiment 1 of the invention.

[0032] In FIG. 1, this notebook-sized personal computer comprises a main body 1 and a display unit 2, which are coupled through a hinge 5. The main body 1 includes a keyboard 6, a pen input device 7, a display processor 9, a magnetic sensor 10 as first contact-free sensor means, various storage devices, various input and output units, and information processing circuits. The display unit 2 has a display panel 3 and a magnet 11 as second contact-free sensor means, and the display panel 3 is protected by a back cover 4. The display panel 3 is also a tablet for pen input. The hinge 5 has axes of rotation in two mutually orthogonal directions. A first axis of rotation is an opening and closing axis of the main body 1 and display unit 2. This opening and closing direction is indicated by arrow 5 a. The display unit 2 is thus opened and closed, and has a free end 2 a and a fixed end 2 b. Magnet 11 is installed at the side of free end 2 a. A second axis of rotation is a rotating axis of the display unit 2. This rotating direction is indicated by arrow 5 b. The magnetic sensor 10 is an example of first contact-free sensor means, and the magnet 11 is an example of second contact-free sensor means.

[0033] When the magnetic sensor 10 and the magnet 11 are placed face to face, the magnetic sensor 10 generates a first signal to the display processor 9. Receiving this first signal, the display processor 9 rotates the display direction of the display panel 3 by 180°.

[0034]FIG. 2A shows a state of closing the display unit 3 by rotating the hinge 5 in FIG. 1 in the direction of arrow 5 a. FIG. 2B shows a state of closing the display unit 3 after rotating the display unit 3 in FIG. 1 by 180° in the direction of arrow 5 b and then rotating in the direction of arrow 5 a. In FIG. 2A and FIG. 2B, same reference numerals as in FIG. 1 are same parts as in FIG. 1, and their explanation is omitted.

[0035] In the state of FIG. 2B, the magnetic sensor 10 is located immediately beneath the magnet 11. The magnetic sensor 10 detects the magnetic field of the magnet 11 penetrating the casing cover, and sends a first signal to the display processor 13 for rotating the display panel by 180°. As a result, in the state of FIG. 2B, when making a tablet input (pen input) by holding the main body 1 by one hand by passing the fingertips through a strap 8 of the main body 1, the screen displays in a normal direction for tablet input operation.

[0036] In FIG. 2A, the magnetic sensor 10 and magnet 11 are apart from each other, and the magnetic field of the magnet 11 does not reach up to the magnetic sensor 10. Accordingly, the display panel 3 shows a screen in a normal direction for keyboard input operation. Similarly in FIG. 1, since the magnetic sensor 10 and magnet 11 are apart from each other, the display panel 3 shows a screen in a normal direction for keyboard input operation. From the state in FIG. 1 showing the screen in a normal direction for keyboard input operation, when the display unit 2 rotated by 180° in the direction of arrow 5 b by the hinge 5, the back cover 4 comes to the front. In this state, when the display unit 2 is closed in the direction of arrow 5 a, the magnetic sensor 10 and magnet 11 come closer to each other gradually, and the magnetic sensor 10 detects the magnetic field of the magnet 11. By selecting the sensitivity of the magnetic sensor 10 and intensity of magnetic force of the magnet 11, the display direction of the display panel 3 can be changed by 180° at a predetermined bending angle.

[0037] Accordingly, in the configuration of exemplary embodiment 1, the magnetic sensor 10 and magnet 11 can be accommodated inside of the casing of the main body 1 and display unit 2. As a result, the precision electrical parts in the personal computer can be enclosed within the casing by shielding from the atmosphere, and it is excellent in protection from water drops and dust and in portability.

[0038] Thus, depending on the state of use of the personal computer, an appropriate screen can be displayed automatically. That is, in the case of pen input (tablet input), the screen in normal direction is rotated by 180° by the signal from the contact-free sensor, and the screen in normal direction is displayed in other cases.

[0039] Further, there is an ample tolerance for the two contact-free sensor means themselves and the mechanical dimensional precision between them, and the shock durability can be enhanced and the reliability is also improved. Besides, when the display processor is disposed at the main body side, it is more advantageous because the wiring of the sensor and display processor is easier.

[0040] The casing material of the main body 1 and display unit 2 can be any material except for magnetic material such as iron plate, and various plastics, magnesium alloy and others having no shielding property to magnetic field can be used.

[0041] Combination of first contact-free sensor means and second contact-free sensor means is magnetic sensor and magnet in exemplary embodiment 1, but it can be also realized by photo sensor and light source, microphone and sound source, simple transmitter and receiver, etc. In short, the first contact-free sensor means and second contact-free sensor means are not limited to those generating magnetism or detecting magnetism. Therefore, the means may include those handling electric waves and sonic waves (including ultrasonic waves), or handling electric field and light (including ultraviolet ray and infrared ray). In these cases, too, when accommodating in the casing, the casing must be made of any material having no problem of shielding of light, sound, electric wave, or electric field.

[0042] In the first contact-free sensor means and second contact-free sensor means, either one is means for detecting without making contact, and other is means for generating any signal to be detected without making contact (generating source).

[0043] In exemplary embodiment 1, since the display processor 9 is incorporated in the main body 1, the magnetic sensor 10 is disposed at the main body side, but if the display processor 9 is incorporated in the display unit 2, the magnetic sensor 10 may be disposed in the display unit 2 and the magnet 11 at the main body 1 side, so that the wiring distribution is more advantageous.

Exemplary Embodiment 2

[0044]FIG. 3 is a perspective view of a notebook-sized personal computer in exemplary embodiment 2 of the invention. FIG. 4A is a plan view of folded state of display unit of the notebook-sized personal computer in exemplary embodiment 2 of the invention. FIG. 4B is a plan view of other folded state of display unit of the notebook-sized personal computer in exemplary embodiment 2 of the invention. In FIG. 3, FIG. 4A and FIG. 4B, same reference numerals are given to same parts as in FIG. 1, FIG. 2A and FIG. 2B in exemplary embodiment 1, and their explanation is omitted.

[0045] What differs between FIG. 3 and FIG. 1 is that exemplary embodiment 2 further incorporates a magnetic sensor 12 as third contact-free sensor means and an power saver 13 provided in the main body 1, in addition to the structure of exemplary embodiment 1. That is, one more magnetic sensor 12 is provided as third contact-free sensor means at a position symmetrical to the magnetic sensor 10 as the first contact-free sensor means. When the display unit 2 is closed, the magnet 11 as second contact-free sensor means is designed to face either the magnetic sensor 10 or magnetic sensor 12. The magnetic sensor 12 is an example of third contact-free sensor means.

[0046] The magnetic sensor 10, same as in exemplary embodiment 1, sends a first signal to the display processor 9 when facing the magnet 11. Receiving the first signal, the display processor 9 rotates the display direction of the display panel 3 by 180°. On the other hand, the magnetic sensor 12 is identical with the magnetic sensor 10 in structure, and when facing the magnet 11, it sends a second signal to the power saver 13. Receiving the second signal, the power saver 13 cuts off the power source of the display panel 3.

[0047]FIG. 4A and FIG. 4B are plan views showing the positional relation of the magnetic sensor 10, magnetic sensor 12 and magnet 11 when the display unit 2 is folded. In FIG. 4A, the personal computer is folded by rotating the display unit 2 in FIG. 3 in the direction of arrow 5 a. In FIG. 4B, the display unit 2 in FIG. 3 is rotated by 180° in the direction of arrow 5 b, and then turned and folded in the direction of arrow 5 a. In FIG. 4A and FIG. 4B, same reference numerals as in FIG. 3 are same parts as in FIG. 3, and their explanation is omitted.

[0048]FIG. 4B shows the use in tablet state, in which the magnetic sensor 10 is face to the magnet 11 same as in exemplary embodiment 1. Therefore, the magnetic sensor 10 sends a first signal to the display processor 9, and the display screen of the display panel 3 is rotated by 180°.

[0049] In FIG. 4A, either the work is temporarily suspended and only the display unit 2 is closed without turning off the main power source of the personal computer, or the work is finished and the display unit 2 is closed after turning off the main power source of the personal computer. In either case, the magnetic sensor 12 is face to the magnet 11. In the former case, since the display panel 3 is not used, the magnetic sensor 12 sends a second signal to the power saver 13, and the power source of the display panel 3 is cut off. In the latter case, since the main power source has been already cut off, the power saver 13 does not operate.

[0050] In the former case, by adjusting the sensitivity of the magnetic sensor 12 and the intensity of magnetic field of the magnet 11, even when the display unit 2 is half open, the power saver 13 can operate.

[0051] In this exemplary embodiment, the magnet 11 is required to radiate the magnetic field to outside, through the display panel 3 side and the back cover 4 side. Hence, it is desired to place the magnet 11 in the middle in the thickness direction of the display unit 2.

[0052] In the explanation above, as the third contact-free sensor means, the magnetic sensor 12 is used. The third contact-free sensor means of the invention is, same as the first contact-free sensor mentioned above, not limited to magnetic detecting means. That is, corresponding to the second contact-free sensor, it may include those handling electric waves and sonic waves, or electric field and light (including ultraviolet ray and infrared ray).

[0053] In the first contact-free sensor means and third contact-free sensor means, either one is means for detecting without making contact, and other is means for generating any signal to be detected without making contact (generating source).

[0054] In the foregoing explanations about the two exemplary embodiments, the display processor 9 is designed to rotate the display direction of the display panel 3 by 180° by receiving the first signal. In the invention, however, the rotating angle of the display direction is not limited to 180° only. Depending on the specification of the personal computer, the rotating angle of the display direction may be set at other angle than 180°.

[0055] In the configuration of exemplary embodiment 2, the magnetic sensor 10, magnetic sensor 12 and magnet 11 can be accommodated in the casing of the main body 1 or display unit 2. Accordingly, since the inside of the casing is isolated from the atmosphere, it is excellent in protection from water drops and dust. Also by incorporating in the inside, nothing projects from the personal computer main body, and hence it is excellent in portability and working efficiency.

[0056] Therefore, an appropriate screen can be automatically displayed depending on the mode of use of the personal computer, and moreover when the display panel is closed and the screen is not visible, the power supply to the display panel is cut off, so that unnecessary power consumption can be saved.

[0057] Further, it is possible to detect without making contact, and the tolerance is ample in the mechanical dimensional precision of the contact-free sensor means itself or between such means, and the shock durability is enhanced and the reliability is improved. Also in this configuration, and the display processor and power saver are disposed at the main body side, the wiring is easy between the sensor and display processor. Further, when the magnet is disposed in the middle of the thickness direction of the display unit, the magnetic force at the display panel side and the magnetic force at the back cover side can be easily equalized, so that the reliability of the magnetic sensor can be further enhanced.

[0058] In this configuration, since the precision electrical parts composing the personal computer can be enclosed and isolated from atmosphere, it is excellent in protection from water drops and dust, and the reliability in outdoor use is enhanced.

[0059] As described herein, the information processing apparatus of the invention comprises the personal computer main body, display unit, contact-free sensor, and means operating as signal source for activating this sensor, and therefore the positional relation of the main body and display unit is known from the signal from the contact-free sensor. Accordingly, the information processing apparatus of the invention changes over the display direction of the display panel or power saving setting of the display unit. The information processing apparatus of the invention incorporates the contact-free sensor and means operating as signal source for activating this sensor within a casing. The information processing apparatus of the invention not only automates changeover of setting, but also improves the protection from water drops and dust and portability of the professional personal computers often used outdoors. 

What is claimed is:
 1. An information processing apparatus comprising: a main body having first contact-free sensor means; a display unit having a display panel and second contact-free sensor means; a hinge having axes of rotation in two directions for coupling the main body and the display unit; and a display processor for rotating the display of the display panel, wherein at least either the first contact-free sensor means or the second contact-free sensor means sends a first signal to the display processor when the first contact-free sensor means and the second contact-free sensor means are placed face to face; and wherein the display processor rotates the display of the display panel according to the first signal.
 2. The information processing apparatus of claim 1, wherein the first contact-free sensor means is composed of a magnetic sensor; wherein the second contact-free sensor means is composed of a magnet; and wherein the second contact-free sensor means is provided at the free end of the display unit.
 3. The information processing apparatus of claim 1, wherein the first contact-free sensor means is composed of a magnet; wherein the second contact-free sensor means is composed of a magnetic sensor; and wherein the second contact-free sensor means is provided at the free end of the display unit.
 4. The information processing apparatus of claim 1, wherein the first contact-free sensor means and the second contact-free sensor means are incorporated in at least one of the main body and the display unit.
 5. The information processing apparatus of claim 1, further comprising: an power saver for saving energy of the display panel, wherein the main body further include third contact-free sensor means; wherein at least either the third contact-free sensor means or the second contact-free sensor means sends a second signal to the power saver when the third contact-free sensor means and the second contact-free sensor means are placed face to face; and wherein the power saver cuts off the power source of the display panel according to the second signal.
 6. The information processing apparatus of claim 5, wherein the first contact-free sensor means and the third contact-free sensor means are composed of magnetic sensors; wherein the second contact-free sensor means is composed of a magnet; and wherein the second contact-free sensor means is provided at the free end of the display unit.
 7. The information processing apparatus of claim 5, wherein the first contact-free sensor means and the third contact-free sensor means are composed of magnets; wherein the second contact-free sensor means is composed of a magnetic sensor; and wherein the second contact-free sensor means is provided at the free end of the display unit.
 8. The information processing apparatus of claim 5, wherein the first contact-free sensor means, the second contact-free sensor means, and the third contact-free sensor means are incorporated in one of the main body and the display unit.
 9. The information processing apparatus of claim 8, wherein the first contact-free sensor means, the second contact-free sensor means, and the third contact-free sensor means are, in case that they are incorporated in the display unit, positioned nearly in the middle in the thickness direction of the display unit.
 10. The information processing apparatus of claim 1, wherein the display panel serves also as an input tablet.
 11. The information processing apparatus of claim 1, wherein an angle that the display processor rotates the display of the display panel is 180°. 